We purchased our hrv in our first ever house, which over the years we have made our home. When we made the purchase the house report made some remarks about the possibility of dampness in our home, which we were used to fork our first flat. Little did we know the extent of it, wheeling windows, mouldy curtains and coughs in the first winter. It was during this that we had our hrv installed and after a couple of weeks the difference was vast. No more condensation, the house felt noticeably drier and even our washing dried faster. The heaters we had installed afterwards only make life drier and better. Best investment we have made, and best of all, we still pay less in our power bill with 4 heaters and the hrv system heat what we did with a heat pump in a flat, half the size.